提取返回值

Question

我要提取從Oracle功能retrun值，確定這裏去

這是一個功能：

FUNCTION set_idoc 
    (Pidoctyp  in varchar2, -- tip idoc-a 
    Pdirect  in varchar2, -- smjer idoc-a 
    Psgln01  in varchar2, -- identifikator pošiljatelja 
    Prgln01  in varchar2, -- identifikator primatelja 
    Pdtdc01  in varchar2, -- datum i vrijeme kreiranja poruke 
    Pbodi01  in varchar2) -- identifikator 
return number is 

Lidoc_num  NUMBER; 
Lind_obr  AGR3PL_IDOC.ind_obr%TYPE; 
BEGIN 

    SELECT SEQ_IDOC.nextval, DECODE(Pdirect, '1', 'U', 'P') 
     INTO Lidoc_num, Lind_obr 
     FROM DUAL; 

    INSERT INTO AGR3PL_IDOC (idoc_num, direct, idoctyp, sgln01, rgln01, dtdc01, bodi01, ind_obr) 
    VALUES (Lidoc_num, Pdirect, Pidoctyp, Psgln01, Prgln01, Pdtdc01, Pbodi01, Lind_obr); 

    return Lidoc_num; 
EXCEPTION 
    when others then raise; 
END; 

所以我NEDD提取Lidoc_num值

我想是這樣的：

System.Data.OracleClient.OracleParameter Lidoc_num = new System.Data.OracleClient.OracleParameter(); 
Lidoc_num.Direction = ParameterDirection.ReturnValue; 
    Lidoc_num.Size = 16; 
         com1.Parameters.Add(Lidoc_num); 

         //Predaj parametre funkciji i vrati broj dokumneta iz baze 
         com1.CommandText = "TRB01.set_idoc('DOC','1','" 
                  + sender + "','" 
                  + reciver + "','" 
                  + cre_date + "','" 
                  + bod_ID + "')"; 
         com1.ExecuteNonQuery(); 

         Lidoc_num = com1.Parameters[0].Value; 

但是什麼都沒有，所以我怎麼能做到這一點

感謝盈方！

Answer 1

解決它！ 它必須是這樣的：

System.Data.OracleClient.OracleParameter prm = new System.Data.OracleClient.OracleParameter(); 
       prm.Direction = ParameterDirection.ReturnValue; 
       prm.DbType = DbType.AnsiString; 
       prm.Size = 16; 
       com1.Parameters.Add(prm); 


       com1.CommandText = "TRB01.set_idoc('DOC','1','" 
                + sender + "','" 
                + reciver + "','" 
                + cre_date + "','" 
                + bod_ID + "')"; 
       com1.ExecuteNonQuery(); 

       Lidoc_num = com1.Parameters[0].Value.ToString();